Quelpr
3 marksEnergetics

CSEC Chemistry · January 2012 · Paper 2 · Question 1(b)(iv)

Experiment 2 was carried out to determine the heat of solution by mixing 8 g of potassium nitrate in 50 cm³ of water.

Draw a labelled energy profile diagram for the reaction taking place in Experiment 2.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 1(a)(i)Define the term 'heat of neutralization'.[2 marks]
  2. 1(a)(ii)Use the data in Table 1 to plot a graph of temperature against volume of acid for Experiment 1 using the axes provided on page 5. The first two points have…[3 marks]
  3. 1(a)(iii)From the graph, determine the volume of sulphuric acid required to completely neutralize 25 cm³ of sodium hydroxide.[1 mark]
  4. 1(a)(iv)Given that the difference in temperature from the start of the reaction to the point of neutralization is 18 °C, calculate the heat change at the point of…[3 marks]
  5. 1(b)(i)Define the term 'heat of solution'.[2 marks]
  6. 1(b)(ii)Figure 2 shows the thermometer readings for the initial and final temperatures obtained for Experiment 2. Record the reading, in °C, on each thermometer in the…[1 mark]
  7. 1(b)(iii)Write a suitable procedure that could be carried out for Experiment 2.[3 marks]
  8. 1(c)(i)Write a balanced half-equation to represent the change which takes place when Solution X reacts with aqueous iron(II) nitrate.[2 marks]
  9. 1(c)(ii)Explain whether Solution X is behaving as a reducing agent, an oxidizing agent or both.[3 marks]
  10. 1(c)(iii)Describe Observation 3 as indicated in Table 2.[2 marks]

More practice: the rest of this paper · more Energetics questions · all CSEC Chemistry past papers